2005/08/31 by Dan Wu, Yaswanth Sai C, Y. C. Ma +11 · 1 citation
Earth and Planetary Sciences · Materials Science · Physics and Astronomy · #Diamond and Carbon-based Materials Research #Electronic and Structural Properties of Oxides #High-pressure geophysics and materials #cond-mat.mtrl-sci #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.73.012501
published as Phys. Rev. B 73, 012501 (2006) · 5 figures, to be published in Phys. Rev. B
arxiv created 2005/11/24 · openalex publication_date 2006/01/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report optical reflectivity study on pure and boron-doped diamond films grown by a hot-filament chemical vapor deposition method. The study reveals the formation of an impurity band close to the top of the valence band upon boron doping. A schematic picture for the evolution of the electronic structure with boron doping was drawn based on the experimental observation. The study also reveals that the boron doping induces local lattice distortion, which brings an infrared-forbidden phonon mode at 1330\phantom\rule0.3em0excm^\ensuremath-1 activated in the doped sample. The antiresonance characteristic of the mode in conductivity spectrum evidences the very strong coupling between electrons and this phonon mode.